Mr Masroor, from North London, said: “I’m aware of at least 20 other cases where families are afraid to even speak out.”

He said the bans had been handed down for some time, but they appeared to have got more common in recent weeks. He said he believed Mr Trump’s proposal was affecting America’s approach to Muslims travelling to the country.

In his own case he was told he could not travel despite having a valid business visa that he had used before earlier this year. He was not given a reason why he could not board the Virgin Atlantic flight from Heathrow, but claimed other passengers who were wearing Islamic clothing were also questioned by security officials.

He said: “We would all be amenable to hearing a reason for the decision, but without any reason, you are just in the dock.”